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(11)

EP 3 307 946 A1

(12)

(43) Date of publication: 18.04.2018 Bulletin 2018/16 (21) Application number: 16733770.8 (22) Date of filing: 09.06.2016

(51) International Patent Classification (IPC):  D21F 3/02(2006.01) D21G 9/00(2006.01) D21F 1/00(2006.01) D21F 3/08(2006.01) G01L 5/00(2006.01) D21F 7/08(2006.01) (86) International application number: PCT/US2016/036592 (87) International publication number: WO 2016/201042 (15.12.2016 Gazette 2016/50)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 10.06.2015 US 201514735892 (71) Applicant: International Paper Company Memphis, TN 38197 (US)	(72) Inventor: FIGIEL, Kerry, D. Cincinnati, OH 45244 (US) (74) Representative: Kunz, Herbert  Fish & Richardson P.C. Highlight Business Towers Mies-van-der-Rohe-Straße 8 80807 München 80807 München (DE)